Heating engineer
Installation, use and maintenance manual – K18 Simplygas
25
3
Heating distribution with two zones controlled by 2-way valves (system with primary water circuit only)
Figure 3.5
Heating distribution 02 - system controller with two 2-way zone valves
1
GHP immersion temperature probe (standard)
2
Bypass section with overpressure valve calibrated to open
only when both valves (3) are closed
3
2-way valve
4
Radiator
5
System controller (required optional OQLT021)
6
Advanced room unit (standard)
7
Advanced room unit (available as optional ODSP050) or
basic room unit (available as optional ODSP004)
A
Connection to K18 unit (GHP plant water temperature
probe)
B
Connection to K18 unit (heating service request). See
system controller manual
C
Outdoor temperature probe connection
D
DHW buffer tank immersion temperature probe connec-
tion (if present)
E
DHW/space heating 3-way diverter valve connection (if
present)
2
7
5
6
3
4
B
C
D
E
ST
1
A
Heating distribution with up to two heating circuits, one of which is optionally mixed and one not mixed (system with primary and
secondary water circuits)
Figure 3.6
Heating distribution 03 - system controller with a mixed heating circuit and a direct one
1
GHP immersion temperature probe
(standard)
2
Decoupling of primary/secondary
circuits (large cross-section pipe with
T-connections or a hydraulic separator)
3
Shut-off valve
4
Zone mixing valve
5
Zone circulating pump (available as
OPMP009/OPMP004 optional)
6
Immersion temperature probe (available
as OSND004 optional)
7
Underfloor heating panel
8
Radiator
9
System controller (required optional
OQLT021)
10 Advanced room unit (standard)
11 Advanced room unit (available as
optional ODSP050) or basic room unit
(available as optional ODSP004)
A
Connection to K18 unit (GHP plant water
temperature probe)
B
Connection to K18 unit (heating service
request). See system controller manual
C
Outdoor temperature probe connection
D
DHW buffer tank immersion tempera-
ture probe connection (if present)
E
DHW/space heating 3-way diverter valve
connection (if present)
3
9
ST
2
8
4
6
7
11
10
ST
1
B
C
D
E
A
5
